I have a Htc 8x, up dated to the new 8.1 dp, my storage was down to 1.2 gb so I deleted some apps I don't use, and got it up to 2 gb. so I used the storage cleaner app I downloaded, it take some time but it cleared the temp files out and I recovered 4 gb of storage, giving me 6.11 gb, wow!
I would of thought that the new up date, or any update for that matter would of cleared out the temp files. so if your storage gets low, or haven't run storage cleaner app, I would do it now.
it works.